In this section, we solve the renormalization group equations for two different energy regions of the 3-2 Type-I seesaw model.
The 3-2 Type-I seesaw model is the minimalist version of the Type-I seesaw that is not directly excluded by neutrino experiments and is sometimes named the minimal Type-I seesaw model (MSM)[1]}, [2]}, [3]}, [4]}, [5]}, [6]}, [7]}, [8]}.
This version introduces two new right-handed neutrinos to the Standard Model that we label as \(N_1 \)  and \(N_2\)  following Eq.(REF ).
We assume the masses of the right-handed neutrinos are hierarchical, satisfying \(M_1 < M_2 < \Lambda \)  according to figure REF .
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